CVE-2025-53770

Microsoft SharePoint Deserialization of Untrusted Data Vulnerability

Sharepoint Server

Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing and fully testing a comprehensive update to address this vulnerability. In the meantime, please make sure that the mitigation provided in this CVE documentation is in place so that you are protected from exploitation.

20. Jul 2025

Ausgewertete Quellen

• Microsoft
  https://msrc.microsoft.com/blog/2025/07/customer-guidance-for-sharepoint-vulnerability-cve-2025-53770/
• Microsoft
  https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53770
• Hinweis
  https://research.eye.security/sharepoint-under-siege/
• Hinweis
  https://x.com/Shadowserver/status/1946900837306868163
• CISA
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53770
• CISA
  Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
• CISA
  https://www.cisa.gov/news-events/alerts/2025/07/20/microsoft-releases-guidance-exploitation-sharepoint-vulnerability-cve-2025-53770
• NVD
  CVE-2025-53770